/*
 * Copyright (C) 2009-2010 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

package org.geometerplus.fbreader.library;

import org.geometerplus.fbreader.tree.FBTree;

import java.util.LinkedList;

public abstract class LibraryTree extends FBTree {
    protected LibraryTree() {
        super();
    }

    protected LibraryTree(LibraryTree parent) {
        super(parent);
    }

    TagTree createTagSubTree(Tag tag) {
        return new TagTree(this, tag);
    }

    AuthorTree createAuthorSubTree(Author author) {
        return new AuthorTree(this, author);
    }

    BookTree createBookSubTree(Book book, boolean showAuthors) {
        return new BookTree(this, book, showAuthors);
    }

    public boolean removeBook(Book book) {
        final LinkedList<FBTree> toRemove = new LinkedList<FBTree>();
        for (FBTree tree : this) {
            if ((tree instanceof BookTree) && ((BookTree) tree).Book.equals(book)) {
                toRemove.add(tree);
            }
        }
        for (FBTree tree : toRemove) {
            tree.removeSelf();
            FBTree parent = tree.Parent;
            for (; (parent != null) && !parent.hasChildren(); parent = parent.Parent) {
                parent.removeSelf();
            }
            for (; parent != null; parent = parent.Parent) {
                ((LibraryTree) parent).invalidateChildren();
            }
        }
        return !toRemove.isEmpty();
    }
}
